AKS，Windows节点，DNS在使用完全限定名称之前不会解析服务 [英] AKS, WIndows Node, dns does not resolve service until fully qualified name is used

问题描述

具有Linux和Windows的多个节点池的AKS群集. Kafka客户:Confluent.Kafka 1.4.4

AKS Cluster with multiple node pools of linux and windows. Kafka Client: Confluent.Kafka 1.4.4

尝试解析名为"tt-kafka-kafka-bootstrap.shared"的kafka服务.

Trying to resolve a kafka service named "tt-kafka-kafka-bootstrap.shared".

在Windows pod中来自with-无法解决:

From with in windows pod - FAILS TO RESOLVE:

kubectl exec -it test-print-7f6b64dc4f-4z7lt --namespace test -- nslookup tt-kafka-kafka-bootstrap.shared
Server: kube-dns.kube-system.svc.cluster.local
Address: 10.0.0.10

*** kube-dns.kube-system.svc.cluster.local can't find tt-kafka-kafka-bootstrap.shared: Non-existent domain

但是如果我可以使用svc.cluster.local来确认服务地址，则可以解决此问题:

BUT IF I QUALIFY THE SERVICE ADDRESS WITH svc.cluster.local, IT RESOLVES:

kubectl exec -it test-print-7f6b64dc4f-4z7lt --namespace test -- nslookup tt-kafka-kafka-bootstrap.shared.svc.cluster.local
Server: kube-dns.kube-system.svc.cluster.local
Address: 10.0.0.10

Name: tt-kafka-kafka-bootstrap.shared.svc.cluster.local
Address: 10.0.192.149

在LINUX POD中使用FROM-解决精细问题:

FROM With in LINUX POD - RESOLVES FINE:

root@test-worker-t1-0:/app# nslookup tt-kafka-kafka-bootstrap.shared
Server: 10.0.0.10
Address: 10.0.0.10#53

Name: tt-kafka-kafka-bootstrap.shared.svc.cluster.local
Address: 10.0.192.149

推荐答案

事实证明Windows无法解析kubernetes中的名称空间.

It turns out windows can not resolve name spaces with in the kubernetes.

有关更多信息，请参阅以下K8文档 Kubernetes中的Windows容器: https://kubernetes.io /docs/setup/production-environment/windows/intro-windows-in-kubernetes/#dns-limitations

Please refer to following K8 documentation for more information on Windows containers in Kubernetes: https://kubernetes.io/docs/setup/production-environment/windows/intro-windows-in-kubernetes/#dns-limitations

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